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Physics
Physics
College
a battery-operated car moves forward as a result of which device?
Physics
High School
A car travels at a constant 1km per hour in the positive direction down a straight line highway. What is the displacement of the car 45 seconds later?
Physics
High School
Late in the paleozoic era the supercontient pangaea formed the climate in the center of pangea was probably ? A.) Extremely cold ,polar climate B.) Hot dry desert climate C.) Wet tropical climate D.) Warm mild climate
Physics
High School
Multi-Select QuestionOn Earth an astronaut weighs 980 Newtons (about 220 pounds) and has a mass of 100kilograms. On the Moon, the same astronaut weighs 162.2 Newtons (about 37 pounds).(Select 2 of 5 Answers)What is the mass of this astronaut on the Moon, and what is the acceleration acting on theastronaut's body when she is standing on the Earth? MULITPLE CHOICENot enough information to solveMass on the Moon: 37 kilogramsAcceleration on Earth: 9.8 m/s/5Acceleration on Earth: 1.6 m/s/sMass on the Moon: 100 kilograms
Physics
High School
An ant is Dragging a Housefly and Elephant is pushing a big tree which is not moving. who is doing work? The ant or the elephant? Justify Your Answer!
Physics
College
Problem 1: If a car is traveling at a speed of 28.0 m/s,is it exceeding the speed limit of 55.0 mi/h?
Physics
High School
can someone explain what is electric energy???
Physics
High School
All of the following devices tiansmit energy/information: cell phones, walkie talkies, remotecontrols, and sunlight. Which statement is true regarding these transmissions?
Physics
College
Q17: A quantity has a unit of Kg.m-1.s-1, then its dimension is:(a) [M2 L2 T?](b) M L?T(c) (M2 LT](d) [M L-1 T-1](e) [M L-11-2]
Physics
Middle School
Our data for how much force is needed can be qualitative. This means we dont have to know exact values for the force in Newtons. Lets use a scale of 1-5 to rank how much force we apply each time. 6. How many different masses should we use?How many trials should we do for each mass?
Physics
College
he atomic radii of Li and O2- ions are 0.068 and 0.140 nm, respectively. (a) Calculate the force of attraction in newtons between these two ions at their equilibrium interionic separation (i.e., when the ions just touch one another). (b) What is the force of repulsion at this same separation distance
Physics
College
The hot reservoir for a Carnot engine has a temperature of 889 K, while the cold reservoir has a temperature of 657 K. The heat input for this engine is 4710 J. The 657-K reservoir also serves as the hot reservoir for a second Carnot engine. This second engine uses the rejected heat of the first engine as input and extracts additional work from it. The rejected heat from the second engine goes into a reservoir that has a temperature of 406 K. Find the total work delivered by the two engines.
Physics
High School
A 2011 Porsche 911 Turbo S goes from 0-27 m/s in 2.7 seconds. What is thecar's acceleration?
Physics
High School
What is an atom? What it is made of? Explain with a paragraph.
Physics
College
According to Newton's second law, what is the acceleration of the released cart?
Physics
High School
Init. AalmatienQuiz 1As shown in the figure below, Justin walks from the house to his truck on a windy day. He walks 20 mtoward the truck, 15 m back to retrieve his wind-blown hat, and another 20 m to reach the truck. Hewalked a total time of 75 s.20 m15 m20 mWhat is Justin's average velocity over the 75 s period?
Physics
College
Elmer Fudd is walking at 2.0 m/s. If he walks for 2.0 minutes, how far does he walk?(Can someone help with the answer due in 5min)
Physics
High School
The 500 pages of a book have a mass of 2.50 kg. What is the mass of each page A in kg B in mg?
Physics
High School
- The school zone in front of your school has a posted speed limit of 25 mi/h, which is about 11 m/s. Let'sexamine the stopping of a car in several different situations.a. The crossing guard holds up her stop sign, and the driver is paying attention well. The car moves at aconstant velocity of 11 m/s for 2.3 seconds while the driver reacts, then slows down at a constant rateof -4.5 m/s2. What is the stopping distance for the car in this situation?
Physics
High School
The friction of the water on a boat produces an acceleration of -10. m/s2. If the boat is traveling at 30. m/s and the motor is shut off, how long does it take the boat to slow down to 5.0 m/s?
Physics
High School
SOMEONE HELP ME SOLVE (A, B, C, D, E, F) WILL MARK BRAINLIEST the first page shows an example!!
Physics
High School
Which statement correctly describes the differences between positive and negative acceleration?Positive acceleration describes a change in speed; negative acceleration describes no change in speed.Positive acceleration describes no change in speed; negative acceleration describes a change in speed.Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
Physics
High School
What is 50,000 in exponential notation?
Physics
High School
If the current delivered in a battery is 1.2 A and the power required for the light is 0.2W, How many volts this power need to be
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